Articulations and Body Movements

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Questions and Answers

Which of the following describes syndesmoses?

Joints connected by fibrocartilage

Joints connected by short ligaments (correct)

Joints filled with synovial fluid

Joints with irregularly shaped bone edges

What type of joint is a Gomphosis?

A joint connecting bones with hyaline cartilage

A joint formed by interlocking irregular bone edges

A joint that holds teeth in place (correct)

A joint connected by short ligaments

What type of cartilage connects bones in synchondroses?

Hyaline cartilage (correct)

Fibrocartilage

Elastic cartilage

Articular cartilage

Which characteristic is NOT typical of synovial joints?

Connection by short connective tissue fibers Signup and view all the answers

Which type of synovial joint allows for rotational movement?

Pivot Signup and view all the answers

What is the primary function of articular discs in synovial joints?

Padding between articulating bones Signup and view all the answers

Which movement decreases the angle between the origin and insertion of a muscle?

Flexion Signup and view all the answers

During abduction, the body part moves in which direction?

Away from the midline Signup and view all the answers

What is the primary function of articulations in the body?

To allow flexibility for gross body movements Signup and view all the answers

How are fibrous joints characterized?

They consist of bones held together by fibrous tissues Signup and view all the answers

Which type of joint classification primarily deals with joint movement capabilities?

Functional classification Signup and view all the answers

Which of the following is NOT a type of functional joint classification?

Syndesmoses Signup and view all the answers

If a joint is classified as diarthroses, what does this indicate about its movement?

The joint allows free movement Signup and view all the answers

Which of the following types of joints are primarily non-movable?

Synarthroses Signup and view all the answers

What is the main distinguishing feature of synovial joints?

They have a joint cavity filled with fluid Signup and view all the answers

During a lab quiz, what is a critical aspect to remember regarding electronic devices?

Their presence may result in immediate consequences if found during the exam Signup and view all the answers

Study Notes

Articulations and Body Movements

An articulation is a joint.
Articulations are classified either structurally or functionally.
Structurally joints are classified as fibrous, cartilaginous or synovial joints.
Functionally joints are classified as synarthroses, amphiarthroses or diarthroses.
Synarthroses are non-movable joints.
Amphiarthroses are slightly movable joints.
Diarthroses are freely movable joints.

Fibrous Joints

Fibrous joints consist of bones held together by fibrous tissues.
Most fibrous joints are synarthrotic or non-movable.
Fibrous joints have no joint cavity.
Types of fibrous joints are sutures, syndesmoses, and gomphoses.
Sutures are joints with bones with irregular edges interlocked by short connective tissue fibers.
Syndesmoses are joints with bones connected by short ligaments.
A Gomphosis is a joint that holds the teeth in the mandible via the periodontal ligament.

Cartilaginous Joints

Cartilaginous joints have articulating bones connected by plates or pads of cartilage.
Cartilaginous joints have no joint cavity.
Most cartilaginous joints are amphiarthrotic (slightly movable).
Types of cartilaginous joints are symphyses and synchondroses.
Symphyses are joints which have bones that are connected by a broad flat disc of fibrocartilage.
Synchondroses are bones connected by hyaline cartilage.

Synovial Joints

Synovial joints have bones separated by joint cavities filled with synovial fluid.
Synovial joints are diarthrotic or freely movable.
Characteristics of synovial joints:
- Articular Capsule: 2 layers - a fibrous capsule of dense irregular connective tissue and a layer of synovial membrane which secretes synovial fluid.
- Articular cartilage (hyaline) on the surfaces of the articulating bones.
- Ligaments (hold bones of joint together).
- Bursae (fluid filled sacs).
- Articular discs may be found (Meniscus), (padding between articulating bones).
Types of synovial joints: plane or gliding, hinge, pivot, condyloid/ ellipsoidal, saddle, ball and socket.

Types of Body Movements

The Origin is the point of attachment of muscle that is immobile.
The Insertion is the point of attachment of muscle that moves.
A Contraction of muscle causes the insertion to move towards the origin.
Flexion decreases the angle between the origin and the insertion.
Extension increases the angle between the origin and the insertion.
Abduction is a movement away from the midline.
Adduction is a movement towards the midline.
Rotation is a movement around the long axis of a bone.
Circumduction is a movement that makes an imaginary cone along the long axis of a bone.

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Description

This quiz covers the classification of articulations and body movements. Learn about the different types of joints including fibrous, cartilaginous, and synovial joints, as well as their functional classifications. Test your knowledge on joint mobility and structure with this engaging quiz.